Multiplying machine



0- .1. M. CUNNINGHAM 2,

' UULTIPLING MACH NE Filed Oct. 24, 192$ 2 Shoots-Sheet 2 LH ACC- 5PAC'C- PUNCH IN CARD POSITIONS 10154-432 8165422! 7 H'ru 87.6852!87.6852! 087. .64120 .64120 OOI.

INVENTOR ATTORNEY Patented Oct. 8, 1940 UNITED STATES MULTIPLYINGMACHINE James M. Endicott, N. Y., assignor 'to InternationalBusiness'Machines Corporation, New York, N. Y., a corporation of NewYork Application mm :4; 1m, Serial No. 101,313

column.

This invention relates to multiplying machines and more particularly tomultiplying machines of the type disclosed in my Patent No. 1,933,granted November 7, 1933.

In such patent there is disclosed mechanism for entering two factorsfrom a record card and multiplying the factors to obtain their productafter which the product is'punched back in the card in the form of codedperforations.

The object of the present invention is to provide a novel controllingmechanism for the punching devices whereby when the product is in theform of a whole number and a decimalthe machine automatically unches thewhole num- 5 her only.

A further object is to provide a novel control of the punching devicesto punch a 1" when the computed product is wholly decimal.

Various other objects and advantages of the invention will be obviousfrom the following particular description of one'form of mechanismembodying the invention or from an inspection of the accompanyingdrawings; and the invention also constitutes certain new and usefulfeatures 5 of construction and combination of parts hereinafter setforth and claimed.

In the drawings:

Fig. 1 is a diagram of the essential circuits of the device.

Fig. 2 is a view showing the essential elements of one order of anaccumulator.

Fig. 3 represents a problem handled as by the device.

In Fig. .1 there is shown so much only of the circuit diagram of themachine as is necessary for an understanding of the invention. The lightlines indicate the wiring found in the machine of my prior patent andthe heavier lines represent the devices and circuits that have beenadded to carry out the objects of the present invention; In describingthe old mechanism, the reference characters employed in the patent willbe utilized so that ready reference may be made thereto for a morecomplete understandingoi the prior art to which the present improvementshave been applied. y

In the center of Fig. 1 are columns of circles with vertical rectanglesadjacent thereto. -This is a diagrammatic representation of theso-called 5o "readout" device LHRO of the accumulator known as the LHaccumulator, whichaccumulator contains the-product computed during theoperation of the machine. The product is represented bythe differentialdisplacement of sets 66 of contact brushes II, Ila of which there is oneset for ,each denominational order of the accumulator.

The brush III is adapted to bridge and form an electrical connectionbetween one of the segments II and a common conductor 12 while the 5brush Illa similarly connects one of the segments it with a commonconductor ll. Thus, .if the product computed were the number 8768521,the brushes Ill, Illa would be displaced as indicated by dotted lines inFig. 1. 1o

- The segments II are connected to wires i5 extending to segments I ofemitter I54 whose ro tating brush emits impulses to lines I! insuccession in the order 9, 8, '7, 6, etc. to complete circuits throughthe positioned brushes I0, .1041 is and these timed impulses willenergize magnets HOSP of a so-called summary products accumulator whichreceives all the separate products to totalize the same.

The essential elements of this SP accumulator 20 are shown in Fig. 2 inwhich the constantly running shaft I! has keyed thereto for rotationtherewith a clutch element I8. This element is slidable along the shaftand is provided with a circular groove into which the short end of a aslever I8 extends. The lever l9 carries ablock 20 which is engaged byarmature latch II to hold the lever in the position shown, against thepressure of blade 22 of a pair of normally open contacts 23. Thesecontacts have been added to the 80 usual accumulator structure for thepurposes of the present invention.

Upon energization of magnet IQIISP, armature latch II will be rockedabout its pivot 24 to release lever is which will thereupon turncounter- 86 clockwise to engage clutch element I8 with teeth 25*integral with gear 26 so that the latter will be turned. Gear 26 mesheswith gear 21 carried by index wheel 28 which displays the value entered.Near the end of the cycle a bar 20 is 40 shifted to the right and afinger 30 thereon will engagethe extremity of lever l9 to rock it backto its latched position. The operation of .this bar 28 is synchronizedwith the operation of emitter Ill to shift to the right one step after45 the 1" segment l6 of the emitter has been contacted. Thus, if animpulse were sent through the 1" segment 16 to energize magnet 1908?,the clutch would be engaged for one step and then positively disengagedwith the result that wheel 28 would have been moved one step. If theimpulse had been transmittedthrough the "2" segment ii the clutch wouldhave been engaged for two steps before being knocked out and wheel 2|would have advanced two steps and so on. ll

The value entered into any order of the SP accumulator is thus dependentupon the time at which the clutch is tripped prior to its point ofknock-out. This is the manner of operation of the well known Hollerithaccumulator which includes the usual tens carry mechanism which need notbe described herein.

The circuits involved in operating the SP accumulator will be understoodby the tracing ofa representative circuit through the right hand orderof the LI-IRO readout, for example. When contacts RBI) and LHA haveclosed during prior operations of the machine, a circuit is traceablewhen the emitter brush contacts its 1 segment l8 as follows: from ACsource 52, line 163, con tacts RHD, LI-IA, emitter I54, 1 segment l6, 1line 15, 1 segment I l, brush III (in dotted position), conductor 12,and right hand magnet HOSP to ground through the usual plug connectionshown. It will be appreciateed that as the emitter [54 operates theamounts in the several orders of the LHRO will control similar circuitsconcurrently so that all orders of the SP accumulator that are toreceive 9's complete circuits at the time; all that are to receive 8'sat the 8 time and so on.

Following this cycle of operations, the LHRO controls the energizationof the punch selecting magnets 792 column by column from left to rightor highest to lowest order. At the commence- Inent of punchingoperations, column selecting brush 815 is in position bridging conductor5! 3 and segment BiE corresponding to the column of the card that is toreceive the highest order digit. Supply of current for the punchselector commen supply line T53 provided at the proper time in theoperation of the machine in the following manner. Upon closure ofcontacts LHC in well manner, closure of cam contacts 06-3 a e 5- time inthe cycle will cause roux DC supply 52, line 182, conwlre 753 to relaycoil B and .3 Energization of B clmes cont-acts and this provides asupply of current thron .ie circuit to line I93 including contacts 859,Tl -z and switch'filli. From 193 the circuit c to conductor 613, brushBi l (in :1 segment H2, plug socket 30, plu contacts 3 L" to socket 32,conductor l 4, brush its, segment l3, wire 33, a magnet 192 to line"iii. The magnet 1'52 energized will be that corresponding to thesegment l3 at which brush l a is set.

Energlzation of any magnet I82 will cause closure of contacts 805 toenergize punch operating magnet Bill which causes the appropriate position in the selected card column to be punched and also escapes thecolumn selecting brush 6 to the next segment 512 to the right. Thereuponthe circuit just traced is again completed in accordance with thesetting of the next brush la and so on.

The operation of the machine as thus far outlined is the same as in myprior patent and in commercial machines with the exception of theclosure of the added contacts 23. A further difference resides in thefact that the punching operations follow after the operation oftransferring the setting of the LHRO device to the SP accumulatorwhereas inthe patent these operations are concurrent. This change isbrought about by re-timing cam contacts CC3 which, as pointed outhereinabove, close at 0 while in the patent they close earlier in thecycle i. e. near the beginning, so that with contacts RHD, LHA

.33, 7 magnet 182 to line "I.

and LHC closed, emitter I54 sends impulses to the magnets HOSP throughLHRO at the same time that CC3 energizes relay B. In the presentinstance CC3 is open during the period that the brush of emitter I54wipes segments l and closes at 0 or just after the 1" segment Ii hasbeen traversed by the brush. Thus the entries into magnets HOSP are madeand relay Z and its contacts Z2 and 2-4 adjusted before relay B isenergized to commence punching by closing its contacts Bl which providea return circuit through contacts LHC. Contacts LHC are closed by magnetIBlLH of the patent and opened when accumulator LH is reset which inturn takes place when the card has reached the so-called last columnposition.

The SP accumulator has eight denominational orders in each of whichthere is a pair of contacts 23, numbered 1 to 8 on Fig. 1, and when anentry is made in any order, the corresponding contacts 23 close. If aswitch 34 is closed, a circult is completed from line 162, switch 34,contacts 23, a relay Z to line "I. Relay Z will close its contacts Z-lwhich establishes a holding circuit through contacts BI and LIIC. Thusrelays Z and B are held for the same period. Relay Z also controls pairsof contacts Z2 and Z-3 at the top of Fig. l and ii an entry is made intoany order of the SP accumulator whose switch 34 is closed, the contactsZ2 will be closed during punching operations and contacts 2-3 will beopen.

Let us assume now that the product in the LH accumulator is a wholenumber and a decimal with the whole number part entered in the 8, '1, 0

and 6 positions and the decimal part in the remaining positions. I! onlythe three highest order switches 34 are closed, relay Z will beresponsive to only entries in these three orders and if any thereofcontains a significant digit, relay Z will be energized when the productis transferred from the LE to the SP accumulator.

If only the whole part of the product is to be punched, only threesegments BIZ are plug connected, the 8 and '7 positions by means orconnections 3! and the sixth position by connections 35 and 36 as shown.An additional connection 31 is also made between sockets 38 and 39.

With this arrangement, if accumulator LH contains the product 87.68521(see Fig. 3), this amount will be entered into the corresponding ordersof the SP accumulator and in so doing, contacts 23 in the 7 and 6positions will be closed, relay Z will be energized and its contacts Z!and 2-4 shifted. During the ensuing punching operations a circuit willbe completed through the zero position of the 8 order of the LHaccumulator to energize the 0 magnet 19! and a zero will be punched. Ina similar manner, an 8 will be punched under control of a circuitthrough the seventh order. For the sixth order, the punch selectingcircuit will be traced from wire 183, common 513, brush 6, segment N2,socket l0, connection 35, contacts Z-2 (now closed), connection 36,common ll, brush Ill, segment 1, wire The amount punched in the card isthus 087 as indicated in Fig. 3.

Where the product is wholly decimal as, for example, the value .64120indicated in Fig. 3, none of the contacts 23 whose switches II areclosed, will be operated and consequently relay Z will not be energizedprior to the punching operations. When such operations take place,circuits will be completed to energize the zero magnet Ill under controlof the brush setting in the 8 and 7 positions of the LH'accumulator inthe normal manner. When brush 6 reaches the third segment H2, however, acircuit is completed which may be traced as follows: from wire 193,common BIS, brush 6, segment 6", socket 30, connection 35, contacts Z-3,wire 0, socket 38, connection 31, socket 39, 1" magnet I92 to line IN.The number punched will thus be 001 as indicated in Fig. 3.

.With the arrangement described, therefore, whenever the productcontains significant digits in certain selected positions, the punchingwill be in accordance with the true amount and when no significantdigits are present in such positions a 1" will be punched in a selectedcolumnar position of the record card.

While there has been shown and described and pointed out thefundamentalnovel features of the invention as applied to a single modification, itwill be understood that various omissions and substitutions and changesin the form and details of the device illustrated and in its operationmay be made by those skilled in the art without departing from thespirit of the invention. It is the intention therefore to be limitedonly as in-- dicated by the scope of the following claims.

What is claimed is as follows:

1. In a machine of the class described. a pinrality of denominationallyordered accumulator elements settable to represent an mount, anaccumulator, means for transferring said amount from said plurality ofelements to said accumulator, means controlled by predetermined elementsof said transferring means for ascertaining whether the amounttransferred contains s nificant digits in corresponding predeterminedorders, punch selecting devices, normally ineffective means for causingone of said accumulator elements to control the operation of said punchselecting devices, and means controlled by said ascertaining means forrendering said last named means efl'ective when any one of said certainorders contains a significant digit.

2. In a machine of the class described, a plurality oi denominationallyordered accumulator elements settable to represent an amount, meanscontrolled by said elements for ascertaining whether the amountrepresented contains significant digits in predetermined orders, punchselecting devices, normally ineffective means for causing one of saidaccumulator elements to control the operation of said punch selectingdevices, and means controlled by said ascertaining means for renderingsaid last named means eifective when any one of said predeterminedorders contains a significant digit.

3. In a machine of the class described, a readout device having aplurality of denominationally ordered elements, each element settable to'represent a digit of a number, a plurality of magnets one for eachdigit of a rotation, means for connecting each element in turn forcontrol of said magnets in accordance with the digital setting of theconnected element, means controlled by said elements for ascertainingwhether all said elements are set to represent zero, and meanscontrolled thereby for preventing control of any of said magnets by apredetermined one of said elements when all are set at zero.

4. The invention set forth in claim 3 in which means is provided andcontrolled by said ascertaining means for energizing the magnetcorresponding to the digit 1 when the element whose control is preventedis connected for control.

5. The invention set forth in claim 2 in which normally eifective meansis provided for controlling the operation of one of said punch selectingdevices and further means is provided and controlled by saidascertainlnglmeans for rendering said normally efiective meansineffective when any one of said certain orders contains a signif cantdigit.

6. In a machine of the class described an accumulator element settableto represent any digit, a plurality of magnets onefor each digit of arotation, a circuit connection normally effective to energize apredetermined one of said magnets, a second circuit connection normallyinefiective and controlled by said accumulator element for energizingthe magnet corresponding to the digital value represented by the settingof said accumulator element, means controlled by said element forascertaining whether said element is set to represent zero or asignificant digit and means controlled thereby when the element is setto represent a significant digit for rendering said normally effectivecircuit connection ineffective and said second circuit connectioneffective.

JAMES M. HAM.

Patont No. 317,15

qknmlcnm a? CORRECTION;

' October ,-19Iw. JAMES H, cumrmm.

I I il bi'oby oortiflnd that error appears piinted ap ociticution otthenbovo. mmberod patent requiring correction as follows: Plgo 3 -aocv and501mm, linpg lz and 57, claims {and reapectivoly, for thoword 1"rotvtion' road -notat1on-- and that the said Letters Patent should be' zgmlw'ith thia correction therein that the same may conform to'tho pocordotizho m. 1n the Plant cram "Signed lie-10a an: 12th 'd of November, A.n. i9lw..

v Henry V041 huddle, (Seal) Acting Comisalloner otlfitonta.

ohmIcAm or comizbnou} October 8,-19140. JAMES H, cummomn.

h I fl ro y oortifiod that error appears in tho printed. upturn-manoftho abovejmmberod patent requiring correction do follows: lPago 5,aoo- 0nd 601m, 1311 312 and 57, claims {and reapectivoly, for theword'l'roto 1:10p" road. notat1on--; .and that the said Letters Patept shouldbo 1: vdth vthia correction therein that the same may conform to-therecord ottho 1a... mime Patent 0fflco.-

"si ma scaled an, -1.2m a of Novombr, A. 1). 191m Hanry Var Aired ale(Seal) Acting Commissioner ofiPote nta.

